I"m going to copy and paste this into the Sys80 thread but I'm having a bit of trouble getting my Haunted House's sound to work after pulling it out of storage. Good news is, other than that, the game plays perfectly after sitting in my basement for a bit. Stoked about that.
When I put it all back together, the audio was working, but was really ugly and distorted, but present. After letting it sit off for a day or two, I got no sound at all. I noticed the -12v was bad and was only doing -7v. Pulled another S/S power supply. I had lying around and now it's booting and sounding nice, HOWEVER I have no sound impulses at all any more. When the board is just sitting, it plays the attract mode sounds loud and clear, but I can't get any of the impulses form the game to do anything!
NiWumpf Driver, Swemmer CPU, rebuild PSU, stock sound board (sound board and driver board tested against working backups I have)
A few things:
All the voltages on the sound board are correct.
I've swapped sound boards and driver boards with known working ones. No change.
Replaced Z31, Z15 on the CPU. No change.
Thoughts on where to look here?